September weather forecastSecretary, MD
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Secretary, Maryland, with an average temperature varying between 63.7°F (17.6°C) and 77.4°F (25.2°C).Temperature
The beginning of September subtly marks a decrease in the average high-temperature, transitioning from 82.9°F (28.3°C) in August to a still moderately hot 77.4°F (25.2°C). Throughout the September nights, Secretary encounters a low-temperature of 63.7°F (17.6°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In Secretary, during September, the rain falls for 13.5 days and regularly aggregates up to 2.05" (52mm) of precipitation. Throughout the year, there are 160.2 rainfall days, and 31.89" (810mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:33 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:47 pm EDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In Secretary, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 5 during September translates into these guidelines:
Put precautions into practice - Ensuring skin and eye safety is a necessity. When the Sun is at its strongest around midday, find shade and limit exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Secretary, MD
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (40.8°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in September
Secretary, MD
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Secretary, MD
- Average wind speed in September: 7.1mph
The windiest months (with the highest average wind speed) are February and March (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Secretary, MD
- Average humidity in September: 78%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (73%).
Average rainfall in September
Secretary, MD
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is July (3.43").
The driest month (with the least rainfall) is January (2.01").
Average rainfall days in September
Secretary, MD
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in September
Secretary, MD
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Secretary, MD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Secretary, MD
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in September
Secretary, MD
- Average sunshine days in September: 14 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in September
Secretary, MD
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Secretary, MD
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Secretary, MD
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
